Spinning oil for synthetic fiber
a synthetic fiber and spinning oil technology, applied in the field of spinning oil for synthetic fibers, can solve the problems of increasing the incidence of fluff and yarn breaking, increasing the cost of oil, etc., and achieve the effect of long-term stable false twisting treatmen
Inactive Publication Date: 2004-02-24
SANYO CHEM IND LTD
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- Abstract
- Description
- Claims
- Application Information
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Benefits of technology
Problems solved by technology
However, with the oil containing a small amount of a modified polysiloxane, a problem has been pointed out; namely, in high-speed false twisting treatment using a radiation type high temperature heater, which has recently been put to practical use, the heater temperature reaches 400.degree. C. or above, so that silica (ash) formed upon thermal decomposition sticks fast to the guide within the heater, increasing the incidence of fluff and yarn breaking.
Of the fluorine compound-containing oils, the former requires a relatively large amount of the perfluoro group-containing compound and this markedly increases the cost of the oil and, in addition, the perfluoroalkyl-containing compound may possibly contaminate the yarn guide and a gas generated upon decomposition thereof may possibly wear the machine, hence the former is not practical, while the latter has a problem from the viewpoint of stable operation in long-period false twisting, since the perfluoro group-containing compound is thermally unstable.
Method used
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Examples
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Effect test
examples 1 to 48
Spin finishes 1 to 51 (Examples 1 to 51) according to the invention and spin finishes for comparison 1 to 14 (Comparative Examples 1 to 14) were prepared using a base oil, namely the polyether lubricant (A) specified below, and other components (B) in accordance with the formulations shown in Tables 1 to 5 and evaluated for the following items. The results are shown in Tables 1 to 5.
Surface tension after 1 hour of standing at 220.degree. C. (mN / m);
Residue on heating after 24 hours of standing at 400.degree. C. (%);
Ratio (V2 / V1) between the kinematic viscosity (V1) of the spin finish at 25.degree. C. after preparation and the viscosity (V2) thereof at 25.degree. C. after 12 hours of standing at 220.degree. C.
(B1-Aa)
An oligomer obtained by copolymerization of C.sub.8 F.sub.17 C.sub.2 H.sub.4 OH acrylate (50 mole percent), polypropylene glycol (MW=1750)-EO (30 moles) adduct monoacylate (25 mole percent) and methyl methacrylate (25 mole percent) (fluorine content=15% by weight, MW=30,00...
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Abstract
It is an object of the invention to provide a spin finish generating neither tar nor scum in false twisting treatment either of the hot plate contact heating type or of the non-contact heating type using a radiation type high temperature heater and thus enabling long term stable false twisting treatment.This invention provides a spin finish for synthetic fibers which satisfies the following relations (1) and (2):where T is the surface tension (mN / m) of the oil after allowing the same to stand at 220° C. for 1 hour and Re is the percent residue (% by weight) on heating of the oil after allowing the same to stand at 400° C. for 24 hours.
Description
The present invention relates to a spin finish for synthetic fibers. More particularly, it relates to a spin finish suited for thermoplastic synthetic fibers submitted to false twisting.An oil containing a small amount of a polyalkylene oxide-modified polysiloxane (Japanese Kokoku Publication Sho-63-57548), an oil containing a perfluoro group-containing compound showing specific thermal decomposition behavior (Japanese Kokoku Publication Sho-62-44072) and an oil containing a copolymer derived from a fluorinated alkyl-containing monomer and a polyoxyalkylene group-containing monomer (Japanese Kokai Publication Hei-11-61645), among others, have been hithertofore proposed as the spin finish for fibers submitted to false twisting.However, with the oil containing a small amount of a modified polysiloxane, a problem has been pointed out; namely, in high-speed false twisting treatment using a radiation type high temperature heater, which has recently been put to practical use, the heater t...
Claims
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IPC IPC(8): D02G1/02D06M15/53D06M15/507D06M15/59D06M15/277D06M15/576D06M15/21D06M15/55D06M15/37
CPCD02G1/026D06M7/00D06M15/277D06M15/507D06M15/53D06M15/55D06M15/576D06M15/59D06M2200/40
InventorMURAKAMI, SATORUHIRONAGA, HIDEO
OwnerSANYO CHEM IND LTD